Extension service-box.



P. M. JACOB.

EXTENSION SERVICE BOX.

APPLICATION FILED MAY 21, 1909.

Patented Apr. 12, 1910.

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FRANCIS lVI. JACOB, 0F COLUMBUS, MISSISSIPPI.

EXTENSION SERVICE-BOX.

Specification of Letters Patent.

Patented Apr. 12, 19110.

Application filed May 21, 1909. Serial No. 497,477.

To all whom it may concern:

Be it known that I, FRANCIS M. Jaoon, citizen of the United States, residing at Columbus, in the county of Lowndes and State of Mississippi, have invented certain new and useful Improvements in Extension Service-Boxes, of which the following is a specification.

This invention relates to extension service boxes of that general class shown and described in former United States Patent issued to me on the 15th day of December 1908, under Number 906,886.

The object of the .invention is generally to improve and simplify the construction of the service box and to so arrange the casing or housing as to permit the service box to be used in connection with different styles of valves as well as in connection with turning plugs or cocks.

A further object of my invention is to provide a service box, the construction and relative disposition of the several parts of which is such that by varying the length of one of the casing sections the box may be lengthened according to the conditions under which it is to be used, and by changing the shape of another section the box may be fitted to valves of different sizes and shapes.

A still further object of the invention is gene ally to improve this class of devices, so as to increase their utility, durability and efliciency, as well as to reduce the cost of manufacture.

For a. full umlerstanding of the invention, and the merits thereof, and to acquire a knowledge of the details of construction and the means for effecting the result, reference is to be had to the following description and accompanying drawings, in which;

Figure 1 is a longitudinal sectional view of an extension service box, constructed in accordance with my invention; Fig. 2 is a top plan view of the same; with the cover removed; Fig. 3 is a side elevation of the cover detached; Fig. l is a side elevation partly in section of the adjacent ends of the intermediate and lower sections of the easing showing the same separated; Fig. 5 is a detail perspective view of the movable cover plate detached. Fig. (3 is a t'ansverse sectional view taken on the line 6--(3 of Fig. 1.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawings by the same reference characters.

The improved extension box forming the subject matter of the present invention comprises a casing preferably formed in three scctions,'5, 6, and 7, the lower section 7 be ing adapted to rest on the housing 8 of the valve 9. The curb box may be used in connection with any style of valve, and by way of illustration is shown implied to a gate valve, the stem 10 of whici extends longitudinally through the gland 11 and is provided with a reduced terminal head 12 of angular formation which projects within the intermediate casing section 6, as shown. The upper end of the casing section (5 is reduced and provided with oppositely disposed .racks 13, while the lower end thereof is provided with a depending flange 14 which fits within the contracted neck 15 of the lower casing section 7 and is provided with oppositely disposed cars 16 arranged to enter correspondingly shaped openings 17 in the section 7 so that when the casing sections are assembled and the section (3 partially rotated, the cars 16 will bear againstthe inclined or cam faces 18 of the lower section 7 and thus lock said sections together.

The upper section 5 of the casing its over the reduced extension of the intermediate section (5 and is provided with vertical ribs 19 which receive the racks 18 and are provided with threaded openings for the reception of screws, pins or similar fastening devices 20 which latter engage the teeth of the rack 13 so that after the upper section 5 has been adjusted thereon to the desired height said upper section may be locked in adjusted position by means of said fastening devices. The upper casing section 5 is provided with a circular head 21 adapted to bear against the surface of the ground, said head being provided with a centrally disposed socket or recess 22, adapted to reccive a detachable cover 23. The cover 23 is provided with a depending flange having bayonet slots 2 formed therein which re ceive locking lugs 25 projecting inwardly from the wall of the depression 22, for the purpose of locking the cover 23 in closed position, there being an opening or socket 26 formed in the top of the cover 23 to permit the insertion of a suitable tool when it is desired to rotate the cover to effect the looking or removal thereof.

Extending transversely across the upper members 29 of an extension rod, the other member 30 of said extension rod being pro-v jected longitudinally beyond theadJacent telescopic member 29 to permit the attachment of a coupling member or sleeve 81. The sleeve 31 receives the angular head'l2 of the valve'stemand is held in engagement therewith by a clamping screw 32, there :being -,asimilarclamping-screw 63: extending through the sleeve :andengaging the member -3O for normally retaining said member in operative positionwith relation -to the valve stem. The intermediate portion of, the extension rod member "29- passes: througlran opening 28 formed in1the:transversediaphllagm on the intermediate easing 6, the openings 28 and 28 serving to center the extension rod within the easing'orhousing and -to maintain said 1 rod in vertical zzl-inement witlr the valve: stemso thatwhen thehead 3a of the member 29 is rotated with a suitable tool the: valve 9* may be raisedor lowered to-control the "flow of fluid through the housing 8. A cross piece34; is*alsofitted in the upper portion ofthe intermediate casing-section 6 and receives the lower-end ofthe member '29 thereby toassist in -hol'ding the-same centrallysviithin the box.

' Theridiaphragm-27 :ofthe-upper casing section 5 is formed with 'a' lateral recess 35 which recessis-normally closed -by a-plate or cover 36 having one endthereof provided with-a depending segmental section 37-and its other end formed with a vertical lug-or finger piece =39 by means -of-whieh the cover maybe lifted-from the casing so -as to permitthe headed end 3% of the member 29- to bepositioned within the-opening 28.

.A 'flange40 depends fronr the lower surface of the partition 27' for engagement with a shoul'der 41 onthe extension rod section 29. This shoulderserves toprevent withdrawal of the member 29 from the casing or housing.

13y forming the casing of the'service box of-a --plurality of detachable sections the length of the box may be varied at-w ill by simply removing the intermediate section 6 andsubstituting a longer or shorter section as the conditions might require, while by changingthe shape and size of thelower easing section 7 the curb box may be used in connection with diflerent styles or types of valves.

"It will also be noted that by adopting a standardsize for the upper and intermediate sections, the length of the box may be variedand said box be made to fit any size or shape of valve by merely changingthe lower casingsection.

Having thus described the invention, what is claimed as new-is:-

1. The combination with -a valve and housing, of a service boxincludingeupper and lower-sections one of which is arranged toabeartagainst the vvalve;housing-and is provided with oppositely disposed recesses having cam lugs extending therefronnthe upper casing section being provided with a depression, and; having oppositely disposed hollow ribs, an intermediate casing-section having its upper endprovided withracks fitting Within the hollow ribs, and its lower end formed with ears adapted-to extend through the recesses in the lower casing section-forengagement with the cam faces of the lugs, .an extension rod comprising telescopic members one of whiclris provided with means for engaging with the valve stem and the other with a head seated in the depression of the upper casing section, and fastening devices extending .through the ribs of the .upper casing section and engaging the teeth of the rack.

.2. The combination With a valve and housing, of a service box including upper and lower casing sections one of whichis adapted to rest on the valve housing,. and is provided with oppositely disposed .recesses having lugs extending therefrom and provided with cam faces, an intermediate section also forming apart of the casing and'havinglocking ears arranged to enter the recessesfor.engagement withthe cam faces of the lugs, an extension rod extending through all of said sections provided with means for detachableengagement with the valve stem, the upper casing section: being adjustable vertically of the intermedh ate section and means for locking the upper casing section in adjusted position.

I11 testimony whereof'I affix my signature in presence oftwo witnesses.

FRANCIS M. JACOB. 

